I think ----------good to help people in need A :that is B :it is C :this is D :they are

I think ----------good to help people in need A :that is B :it is C :this is D :they are

B

it引导从句，
it is good to do sth 做某事很好

~~~~~~~~~~～～~~~~祝你进步，如对你有帮助，请及时采纳~~~~~~~~~~~~~~~~

b. the 表确指“那个”；a 表泛指，错误；/ 是不填冠词，而名词在用到的时候都是有所指的，错误；bus number公交车号码，也是泛指意义，错误。 “俊狼猎英”团队为您解答，祝学习进步！

:they are 选B 这里是I think后省略了that。 it is adj+to do sth.这是宾语从句, (that) it is good:it is C I think ----------good to help people in need A .. 结构 【英语牛人团】倾情奉献，满意请记得及时采纳哦:this is D :that is B .，脑力结晶